44results about How to "Electrical uniformity" patented technology

A novel method and apparatus of wet processing workpieces, such as electroplating semiconductor wafers and the like, that incorporates reciprocating processing fluid agitation to control fluid flow at the workpiece, and where electric fields are involved as in such electroplating, controlling the electric field distribution.

The invention relates to substrates of semi-insulating silicon carbide used for semiconductor devices and a method for making the same. The substrates have a resistivity above 106 Ohm-cm, and preferably above 108 Ohm-cm, and most preferably above 109 Ohm-cm, and a capacitance below 5 pF/mm2 and preferably below 1 pF/mm2. The electrical properties of the substrates are controlled by a small amount of added deep level impurity, large enough in concentration to dominate the electrical behavior, but small enough to avoid structural defects. The substrates have concentrations of unintentional background impurities, including shallow donors and acceptors, purposely reduced to below 5·1016 cm−3, and preferably to below 1·1016 cm−3, and the concentration of deep level impurity is higher, and preferably at least two times higher, than the difference between the concentrations of shallow acceptors and shallow donors. The deep level impurity comprises one of selected metals from the periodic groups IB, IIB, IIIB, IVB, VB, VIB, VIIB and VIIIB. Vanadium is a preferred deep level element. In addition to controlling the resistivity and capacitance, a further advantage of the invention is an increase in electrical uniformity over the entire crystal and reduction in the density of crystal defects.

An organic electroluminescent display device includes an organic electroluminescent diode receiving a driving voltage and a first ground voltage; first and second driving thin film transistors for providing a driving current to the organic electroluminescent diode, each of the first and second driving thin film transistors receiving one of the driving voltage and the first ground voltage; a first switching thin film transistor receiving a data voltage and switched by an nth scan signal to output the data voltage; a second switching thin film transistor switched by a current providing signal to provide the one of the driving voltage and the first ground voltage to the second driving thin film transistor; a third switching thin film transistor receiving a second ground voltage and switched by a selection signal to output the second ground voltage to an output terminal of the first switching thin film transistor; a fourth switching thin film transistor disposed among an output terminal of the second switching thin film transistor, a gate terminal of the first driving thin film transistor and a gate terminal of the second driving thin film transistor and switched by the selection signal; and a first capacitor disposed among the output terminal of the first switching thin film transistor, the gate terminal of the first driving thin film transistor and the gate terminal of the second driving thin film transistor, wherein “n” is a positive integer.

The invention relates to a doping type solar cell front silver paste. The composition and weight percentage of the paste is 75% to 90% of silver powder, 1% to 8% of glass powder, 1.5% to 4% of organic binder, 0.1 % to 10% of compound containing indium and zinc, 0% to 1% of dispersing agent, and a solvent as a surplus, wherein the glass powder is la, boron, and zinc glass system, the compound containing indium and zinc is A(Zn(CH3(CH2)16COO)2), and A comprises the element In. According to the doping type solar cell front silver paste, since the la, boron, and zinc glass system glass powder is employed, the compound containing indium and zinc is added at the same time, the bonding strength between an electrode and a silicon substrate is strengthened, and the series resistance and sheet resistance are reduced. At the same time, in the compound containing indium and zinc, a zinc component is hard zinc stearate, the effect of surface tension of a contact interface between the compound containing indium and zinc and the organic binder and the solvent, and the electric performance of the electrode is more uniform.

A large semiconductor crystal has a diameter of at least 6 inches and a low dislocation density of not more than 1×10⁴ cm⁻². The crystal is preferably a single crystal of GaAs, or one of CdTe, InAs, GaSb, Si or Ge, and may have a positive boron concentration of not more than 1×10¹⁶ cm⁻³ and a carbon concentration of 0.5×10¹⁵ cm⁻³ to 1.5×10¹⁵ cm⁻³ with a uniform concentration throughout the crystal. Such a crystal can form a very thin wafer with a low dislocation density. A special method and apparatus for producing such a crystal is also disclosed.

The invention provides a liquid crystal display device. A first epitaxial electrode layer which is used for connecting a conduction point and extends towards the outer side of an array substrate is arranged at the edge of the array substrate, a second epitaxial electrode layer which extends towards the outer side of a color film substrate is arranged at the edge of the color film substrate, at the same time a conduction light-shielding layer which is coated with graphene and light-shielding materials is arranged at the broadside of a liquid crystal display panel, wherein the conduction light-shielding layer is capable of shielding the light leakage around the liquid crystal display device, and is capable of simultaneously connecting the first epitaxial electrode layer and the second epitaxial electrode layer so that breakover is achieved between the array substrate and the color film substrate. Compared with the prior art, conducive gold gum does not need to be produced, the producing time is short, and the product cost is short; meanwhile, due to the fact that graphene has high thermal conductivity efficiency and high electricity conductivity rate, the heat dissipation capability around the liquid crystal display device can be promoted, and the liquid crystal display device is uniform in overall electricity, good in display effect, and has an anti-static function.

A compound comprising i) one or more dienophile groups (A-functional groups), ii) one or more ring structures comprising two conjugated carbon-to-carbon double bonds and a leaving group L (B-functional groups), and iii) one or more addition polymerizable, telechelic, or graftable functional groups, excluding groups capable of cycloaddition reactions with acetylenic- or conjugated diene functionality (C′-functional groups), characterized in that the A-functional group of one monomer is capable of reaction under cycloaddition reaction conditions with the B-functional group of a second monomer to thereby form a polymer.

A TFT substrate includes a substrate and at least a TFT disposed thereon. The TFT includes a semiconductor island and at least a gate. The semiconductor island has a source region, a drain region, and a channel region interposed therebetween. The semiconductor island has sub-grain boundaries. The gate corresponds to the channel region. A first included angle between an extending direction of the gate and a line connecting the centroid of the source region with the centroid of the drain region is not substantially equal to 90 degrees. A second included angle between the sub-grain boundaries in the channel region and the line connecting the centroid of the source region with the centroid of the drain region is not substantially equal to 0 degree or 90 degrees. Additionally, a method of fabricating a TFT substrate, an electronic apparatus, and a method of fabricating the electronic apparatus are also provided.

The invention discloses ultrahigh-conductivity nano-carbon masterbatch as well as a preparation method and application thereof. The ultrahigh-conductivity nano-carbon masterbatch is prepared from 30-58.5 parts of polycarbonate, 40 to 67 parts of conductive nano carbon masterbatch, 1-2 parts of an antioxidant and 0.5-1 parts of an efficient dispersant through steps of internal mixing, extrusion andgranulation. The conductive nano carbon is formed by compounding multi-walled carbon nanotubes, porous graphene and a coupling agent. The multi-walled carbon nanotubes and the porous graphene are matched for use, and due to the existence of vacancies, the multi-walled carbon nanotubes can be embedded into the porous graphene with the vacancies to play a bridging role, so that the whole system ismore communicated, and the electrical property is better; then the efficient dispersant is added to reduce agglomeration of the conductive nano carbon; compared with the direct twin-screw extrusion ofconductive materials, the method has the advantages that the agglomeration is reduced, the distribution of the conductive material is more uniform, the conductive network is smoother, and the electrical property is more uniform, so that the surface resistivity of the material is greatly reduced.

The invention provides slurry for coating an isolating membrane of a lithium ion battery. The slurry comprises the following components: nano-grade aluminum oxide, carboxylic butadiene-styrene latex, aluminum fluoride, N-methylpyrrolidone, vinyl pyrrolidinone, divinyl carbonate, an aqueous fluorine flatting agent, aqueous fluoride dispersing liquid, an associated thickening agent and the balance being deionized water. The invention further provides a preparation of the slurry. By virtue of combination of the components in special ratios, the slurry for coating the isolating membrane of the lithium ion battery has excellent properties of resisting high temperature up to 250 DEG C and low temperature up to -80 DEG C, and meanwhile, by virtue of spherical ultrasonic dispersion treatment used when the slurry is prepared and the special process that the basic isolating membrane is coated with the slurry, the prepared isolating membrane has the characteristics that the coating is good in molecular dispersivity, uniform in thickness and uniform in electrical property.

The invention relates to an electroplating process of a neodymium iron boron magnet, electroplating equipment is used in the electroplating process, the electroplating equipment comprises an electroplating pool, a placing frame capable of being placed in the electroplating pool, and a weight detection mechanism used for detecting the weight of the magnet in electroplating liquid before and after electroplating, and the electroplating process comprises the following steps: S1, carrying out electroplating; the pretreated magnet is placed on the placing frame; s2, placing the shelf in an electroplating tank; s3, electroplating the magnet under the action of current; s4, a weight detection mechanism monitors the weight of the magnet before and after electroplating in real time and sends a signal to the controller; s5, the controller passes through a formula (h is the thickness of the plating layer; delta m is the weight of the plating layer; rho is the plating layer density; and S: the surface area of the magnet), the real-time thickness of the plating layer is calculated until the plating layer reaches the preset thickness, and the real-time weight of the plating layer is monitored through the weight detection mechanism, so that the real-time thickness of the plating layer is calculated, the increase and decrease of the current density are controlled, and the electroplating efficiency is improved.

The invention provides an ion implantation method and an ion implantation system. The ion implantation method comprises the following steps of providing a wafer, wherein a plurality of channel holes are formed in the wafer, the communication holes located in the center area of the wafer are perpendicular to the surface of the wafer, and the channel holes located in the edge area of the wafer incline by an angle smaller than 90 degrees relative to the direction perpendicular to the surface of the wafer; and enabling the wafer to perform arc reciprocating motion along a first direction, and carrying out ion implantation in the wafer along a second direction, wherein the first direction is perpendicular to the second direction. According to the ion implantation method provided by the invention, in the process of carrying out ion implantation along the second direction to enable the wafer to do arc-shaped reciprocating motion along the first direction vertical to the second direction, theions can be ensured to be injected into the bottom of each channel hole, so that the ion implantation quantities of the bottoms of the channel holes are the same, the influence of different inclination degrees of the channel holes in different regions of the wafer relative to the direction perpendicular to the surface of the wafer on the ion implantation effect is eliminated, the electrical property and yield of a device can be ensured, and the whole wafer has better and more uniform electrical property.

The invention belongs to the technical field of a semiconductor, and discloses a compound semiconductor metal contact electrode. Platinum Pt and gold germanium AuGe in the conventional non-alloy metal electrodes Ti/Pt/Au, Pt/Ti/Pt/Au and alloy type metal electrodes AuGe/Ni/Au are replaced by palladium Pd or palladium germanium Pd/Ge, and top layer noble metal Au is replaced by copper Cu or silver Ag to obtain two kinds of metal contact electrodes which comprise a metal conductive layer and a bonding layer, and comprise a metal conductive layer, a diffusion blocking layer and a bonding layer, wherein the metal conductive layer is a Cu or Ag layer; the diffusion blocking layer is a Pd or Ti/Pd layer; and the bonding layer is a Ti, Pd or Pd/Ge layer. The compound semiconductor metal contact electrode disclosed in the invention has the advantages of low contact resistance, high intrinsic conductivity, high thermal stability, strong adhesive force in connection with the semiconductor, low production and manufacturing cost and the like.

The invention discloses a spray head system capable of continuously homogenizing chemical vapor deposition in large area. The system comprises a conveying tube, a fixed panel, a primary reaction gas mixing cavity and a jet tube, wherein the primary reaction gas mixing cavity is arranged at the upper part of the fixed panel; the jet tube is arranged at the lower part of the fixed panel; the jet tube is provided with a jet exhaust; a circulating water cooling system is also arranged at the upper part of the fixed panel; a secondary reaction gas mixing cavity is also arranged at the lower part of the fixed panel; the jet tube is covered in the secondary reaction gas mixing cavity; the cross section of the secondary reaction gas mixing cavity is in a V shape; a monolete nozzle is arranged on the bottom of the secondary reaction gas mixing cavity; and raw material gas enters the primary reaction gas mixing cavity through the conveying tube, enters the jet tube, then enters the secondary reaction gas mixing cavity after the gas is sprayed from the jet exhaust of the jet tube, and finally is sprayed out from the monolete nozzle. The system can lower the deposition temperature so as to lead homogenization of a film to be easily controlled during large-area deposition, thereby ensuring normal running of continuous large-scale production.

A germanium single-crystal wafer comprises silicon with an atomic concentration of from 3×10¹⁴ atoms/cc to 10×10¹³ atoms/cc, boron with an atomic concentration of from 1×10¹⁶ atoms/cc to 10×10¹⁸ atoms/cc, and gallium with an atomic concentration of from 1×10¹⁶ atoms/cc to 10×10¹⁹ atoms/cc. Further provided are a method for preparing the germanium single-crystal wafer, a method for preparing a germanium single-crystal ingot, and the use of the germanium single-crystal wafer for increasing the open-circuit voltage of a solar cell. The germanium single-crystal wafer has an improved electrical property in that it has a smaller difference in resistivity and carrier concentration.